Discussion on: 20 Killer JavaScript One Liners ☝️

[Dumitru Uzun]

Shorter:

const isDateValid = (...val) => !Number.isNaN(+new Date(...val));
const dayDif = (date1, date2) => Math.ceil(Math.abs(date1 - date2) / 86400000);
const randomHex = () => `#${((1<<24)|Math.random() * 0xffffff).toString(16).slice(1)}`;